Inheritance tax paid on what you leave behind to your heirs, and they could pay as much as 40% tax on what they inherit.
The good news is that there are lots of ways to cut down your bill, which we've explained in full in our guides to inheritance tax.
But this calculator can help you estimate what potential inheritance tax bill your heirs might potentially have to pay.
Enter in your assets and any debts, and we'll show you how much your estate is worth - and an estimate of how much could be subject to inheritance tax.
The calculator has been updated with the inheritance tax allowances for the 2020-21 tax year.
Please note that this calculator doesn't account for any gifts made or trusts established, which may lead to a higher inheritance tax bill.